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In a data exchange system the correctness of the system depends on data exchange semantics. This can be well verified by using query answering. In the close world assumption (CWA) two types of answers are obtained, one is certain answer, which ignores the null values, another is maybe answer, which considers the null values. In this thesis, we give a procedure for computing a finite representation...
This paper discusses the network gatekeeper technology, and proposes a security domain isolation and data exchange model based on virtual machine monitor (VMM). Then we give up an implement framework of this model based on XEN. Finally, we discuss the security feature and the future appliance effect of the model.
We propose an effective construction technology of the beef traceability system that conforms to the law relating to special BSE countermeasures to trace, track and indicate the history of beef products. This system makes it possible to share background information on beef between enterprises from producers to retailers by using Web EDI technology. The beef traceability system was implemented in September...
At the present time universities become a part of market economy. Therefore, the strategic management has a great importance for the productive and effective functioning and growth of high schools. One of the forms of the strategic university management is the complex plan. The strategic plan is a document, which determines primary ways, the goals system and the expansion strategy of the university...
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